The frequency error is the difference between the RF modulated carrier frequency transmitted from the UE and the
assigned frequency. The UE transmitter tracks to the RF carrier frequency received from the Node B. These signals will have an apparent error due to Node B frequency error and Doppler shift. In the later case, signals from the Node B must
be averaged over sufficient time that errors due to noise or interference are allowed for within the minimum
requirements specified in 5.3.2.
This test verifies the ability of the receiver to derive correct frequency information for the transmitter, when locked to the DL carrier frequency.
这是3GPP 34.121 中的一段话,不明白 频率误差 不是发射参数么?为什么是 the ability of the receiver ?